摘要
在许多化学和生物体系的变化过程中,溶剂性质起着重要的作用.在一些含水的有机溶剂中,大的有机化合物分子由于疏水亲脂相互作用倾向于簇集和自挠曲,从而大大影响分子的化学反应性能和物理性质.这种相互作用也应存在于生命体的细胞中,而表现出生理上的变化.蒋锡夔等曾报导含水量不同溶剂对一系列长链分子化学反应性的影响。
Solvent effect on the conformations of α,ω-bis(4-nitrophenoxy)-alkanes with dif-ferent chain lengths(N_n) was studied by UV spectra. In poor solvents such as EG-H_2O and THF-H_2O, with the increase of water content, the K-bands of N_4, N_5, N_6and N_(10) in the UV absorption spectra shifted to longer wavelengths as compared with4-nitrophenoxyethane(N_0). It is suggested that in poor solvents the two aromatic groupsare close in parallel to each other, forming ground state complexes. The K-band ofN_4 showed a blue shift from that of N_0 when the water content was around 5% thismay probably be attributable to a conformation with the nitro group of one benzenering siting on the plane of the other benzene ring.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
1992年第5期659-663,共5页
Acta Physico-Chimica Sinica
关键词
溶剂效应
构象
紫外光谱
直链烷烃
Solvent effect
Conformation
Hydrophobic-lipophilic interaction
Ultraviblet spectra
